Critical Load maps

This web map service (WMS) provides Concentration Based Estimated Deposition (CBED) values of sulphur and nitrogen atmospheric deposition for 5x5 kilometre (km) grid squares of the UK averaged over the years 2011 to 2013.

The maps show deposition values (kg ha-1 year-1) for oxidised nitrogen (NO₂/NO₃), reduced nitrogen (NH₃/NH₄) , non-marine sulphur (SO₂/SO₄) and base cations (Ca+Mg) . These total deposition values are the sum of four components calculated separately: wet deposition, dry deposition of gases, dry deposition of particulate matter and cloud droplet deposition.